/// <summary>
/// Async method to record requester accessing link.
/// </summary>
/// <param name="longShortUrl">The long short url object</param>
/// <param name="userAgent">User agent details of requester</param>
/// <param name="ipAddress">IP address of requester</param>
/// <returns></returns>
private async Task addUserAccessingUrlAsync(LongShortUrl longShortUrl, string userAgent, string ipAddress)
{
longShortUrl.LongShortUrlUsers.Add(new LongShortUrlUser()
{
UserAgent = userAgent,
IpAddress = ipAddress
});
await _longShortUrlRepository.UpdateAsync(longShortUrl, true);
}
/// <summary>
/// Takes a long url and generate a new shortened url
/// </summary>
/// <param name="longUrl">The long url that will be shortened</param>
/// <returns>A <see cref="LongShortUrl"/></returns>
private LongShortUrl addLongShortUrl(string longUrl)
{
LongShortUrl longShortUrl = new LongShortUrl()
{
// Generate unquie short url id
ShortUrlId = BaseGeneralHelper.GenerateRandomString(BaseConstants.MaxSizeShortUrlId),
LongUrl = longUrl
};
bool exitLoop = false;
LongShortUrlRepository.InsertStatus insertStatus;
// Retry logic for generating short url
for (int i = 0; i < BaseConstants.RetryInsertAttempts; i++)
{
// Try to insert long url into database
insertStatus = _longShortUrlRepository.Insert(longShortUrl, true);
switch (insertStatus)
{
case LongShortUrlRepository.InsertStatus.Success:
exitLoop = true;
break;
case LongShortUrlRepository.InsertStatus.DuplicateShortUrlId:
// Duplicate short url id exists, create new id and try again
longShortUrl.ShortUrlId = BaseGeneralHelper.GenerateRandomString(BaseConstants.MaxSizeShortUrlId);
break;
case LongShortUrlRepository.InsertStatus.DuplicateLongUrl:
// Duplicate long url exists, get record for long url
longShortUrl = _longShortUrlRepository.GetLongShortUrlByLongUrl(longUrl);
exitLoop = true;
break;
}
if (exitLoop)
{
break;
}
}
return longShortUrl;
}
